TY  - GEN
AU  - Purohit, S.S
AU  - Agrawal, A.K
AU  - Shammi, Q.J
TI  - A textbook of environmental science
SN  - 8188826146
U1  - 333.7 
PY  - 2004///
CY  - Jodhpur
PB  - Student Edition
KW  - Environmental science
KW  - Natural resources
ER  -